WO2022174633A1

WO2022174633A1 - Laying method for regular hexagonal composite open housing

Info

Publication number: WO2022174633A1
Application number: PCT/CN2021/131371
Authority: WO
Inventors: 田桂芝; 武海生; 黎昱; 陈维强; 刘佳; 朱大雷
Original assignee: 北京卫星制造厂有限公司
Priority date: 2021-02-19
Filing date: 2021-11-18
Publication date: 2022-08-25
Also published as: CN113002012B; CN113002012A

Abstract

Disclosed is a laying method for a regular hexagonal composite open housing, the method comprising the following steps: presetting a regular hexagonal composite open housing; laying at 0° on six side faces and a bottom face with a unidirectional prepreg; laying at M° on the six side faces and the bottom face with the unidirectional prepreg; laying at 60° on the six side faces and the bottom face with the unidirectional prepreg; laying at N° on the six side faces and the bottom face with the unidirectional prepreg; and laying at 90° on the six side faces and the bottom face with the unidirectional prepreg. The method can effectively ensure the fiber continuity at edges of each layer of a regular polygonal structure, and can also ensure that each layer is symmetrical relative to the structure, and thus ensure the mechanical properties and dimensional stability of the structure.

Description

A method for laying up regular hexagonal composite open shells

This application claims the priority of the Chinese patent application filed on February 19, 2021 with the application number 202110191845.3 and the application name "A method for laying up a regular hexagonal composite open shell", the entire contents of which are Incorporated herein by reference.

technical field

The invention belongs to the technical field of composite material structure forming, and in particular relates to a layering method of a regular hexagonal composite material open shell.

Background technique

The antenna reflector is an important part of the antenna. As a new type of antenna reflector structure, the regular polygon composite open shell structure has high requirements on dimensional accuracy and structural stability. In the existing fiber layup, the fibers at the edges of each layup are discontinuous, and each layup is symmetrical with respect to the structure, so that the mechanical properties and dimensional stability of the antenna reflector cannot be guaranteed.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, a method for laying up regular hexagonal composite material open shells is provided, which effectively ensures that the fibers at the edges of each laying layer of the regular polygonal structure are continuous, and at the same time It can ensure that each layer of layup is symmetrical relative to the structure, thereby ensuring the mechanical properties and dimensional stability of the structure.

The object of the present invention is achieved through the following technical solutions: a method for laying up a regular hexagonal composite open shell, the method comprising the following steps: Step 1: Presetting a regular hexagonal composite open shell; The shape composite open shell includes six sides and one bottom; all six sides are connected with the bottom; step 2: the unidirectional prepreg adopts 0° layup for the six sides and one bottom; step three: in step two On the basis of the unidirectional prepreg, M° is applied to the six sides and one bottom surface; where M° is an angle between 0° and 60°; Step 4: On the basis of Step 3, the unidirectional prepreg is The prepreg adopts 60° layup on six sides and one bottom surface; Step 5: On the basis of Step 4, the unidirectional prepreg adopts N° layup on six sides and one bottom surface; where N° is 60° Angle between ~90°; Step 6: On the basis of Step 5, the unidirectional prepreg is layered at 90° on six sides and one bottom surface.

In the above-mentioned lamination method of the regular hexagonal composite open shell, in step 2, the height direction along the regular hexagon on the side is defined as the 0° direction of the fiber, and the side fiber is naturally formed after being folded along the regular hexagonal edge. The direction of the fiber is defined as the 0° direction of the fiber on the bottom surface; the edges at the opening of the regular hexagon are respectively defined as the first edge, the second edge, the third edge, the fourth edge, the fifth edge, and the sixth edge. Edge, seventh edge, eighth edge, ninth edge, tenth edge, eleventh edge and twelfth edge, starting from the first edge, unidirectional prepreg The 0° ply is folded along the seventh edge and then spreads at the center of the bottom surface, and the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the two endpoints of the seventh edge is cut off; from the second edge Start laying up, the unidirectional prepreg 0° layup is folded along the eighth edge, and then it is laid at the center of the bottom surface, and the unidirectional prepreg is outside the triangular area formed by the center of the bottom surface and the two endpoints of the eighth edge. Cut off; Lay up from the third edge, the unidirectional prepreg 0° ply is folded along the ninth edge, and then lay down and stop at the center of the bottom surface. The center of the bottom surface and the two endpoints of the ninth edge are formed. The unidirectional prepreg outside the triangular area is cut off; the layering starts from the fourth edge, and the 0° layering of the unidirectional prepreg is folded along the tenth edge and then stops at the center of the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the ten edges; start laying up from the fifth edge, and fold the unidirectional prepreg at 0° along the eleventh edge before laying Stop at the center of the bottom surface, and cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the two endpoints of the eleventh edge; start from the sixth edge and lay the unidirectional prepreg at 0° After the layer is folded along the twelfth edge, it is spread at the center of the bottom surface, and the unidirectional prepreg is cut off outside the triangular area formed by the center of the bottom surface and the two end points of the twelfth edge.

In the above-mentioned lamination method of the regular hexagonal composite open shell, in step 3, the lamination is started from the first edge, and the unidirectional prepreg M° lamination is along the side and the seventh edge of the regular hexagon. Folded to the bottom, the unidirectional prepreg is uninterrupted; starting from the second edge, the M° layer of the unidirectional prepreg is folded to the bottom along the side and the eighth edge of the regular hexagon, and the unidirectional prepreg is folded to the bottom. The prepreg is uninterrupted; starting from the third edge, the unidirectional prepreg M° layup is folded to the bottom along the side of the regular hexagon and the ninth edge, and the unidirectional prepreg is uninterrupted; The layering starts at the fourth edge, and the unidirectional prepreg M° layer is folded to the bottom along the side of the regular hexagon and the tenth edge, and the unidirectional prepreg is uninterrupted; the layering starts from the fifth edge. Layer, the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the eleventh edge, and the unidirectional prepreg is uninterrupted; starting from the sixth edge, the unidirectional prepreg The material M° layer is folded to the bottom along the side and twelfth edge of the regular hexagon, and the unidirectional prepreg is uninterrupted; from the first edge, the second edge, the third edge, and the fourth edge , The unidirectional prepreg M° layup at the beginning of the fifth edge and the sixth edge, all folded and then layed on the bottom, and the unidirectional prepreg M° layup in different directions has excess length after the bottom face is connected The bottom surface and six sides except the bottom surface fracture are layered; among them, the bottom surface fracture is a regular hexagon with the same shape as the bottom surface; the fiber woven cloth is covered with the bottom surface fracture.

In the above-mentioned lamination method of the regular hexagonal composite open shell, in step 4, the lamination starts from the first edge, and the 60° lamination of the unidirectional prepreg is along the side and the seventh edge of the regular hexagon. Fold over and stop at the center of the bottom surface, and cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the two endpoints of the seventh edge; start laying at the second edge, and the unidirectional prepreg is 60° After the layup is folded along the eighth edge, it is laid at the center of the bottom surface, and the unidirectional prepreg outside the triangle area formed by the center of the bottom surface and the two end points of the eighth edge is cut off; the laying starts from the third edge. layer, the unidirectional prepreg 60° layup is folded along the ninth edge and then spreads to stop at the center of the bottom surface, and the unidirectional prepreg outside the triangle area formed by the center of the bottom surface and the two endpoints of the ninth edge is cut off ; Starting from the fourth edge, the unidirectional prepreg 60° layup is folded along the tenth edge and then laid at the center of the bottom surface to stop, the center of the bottom surface and the two endpoints of the tenth edge form a triangular area The outer unidirectional prepreg is cut off; the layering starts from the fifth edge, and the 60° layering of the unidirectional prepreg is folded along the eleventh edge and then spreads at the center of the bottom surface, and the center of the bottom surface is the same as the tenth edge. The unidirectional prepreg outside the triangular area formed by the two end points of one edge is cut off; the layering starts from the sixth edge, and the 60° layering of the one-way prepreg is folded along the twelfth edge and then laid Stop at the center of the bottom surface, and cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the two endpoints of the twelfth edge.

In the above-mentioned lamination method of the regular hexagonal composite open shell, in step 5, the lamination is started from the first edge, and the unidirectional prepreg N° lamination is along the side and the seventh edge of the regular hexagon. Folded to the bottom, the unidirectional prepreg is uninterrupted; starting from the second edge, the unidirectional prepreg N° layup is folded to the bottom along the side and eighth edge of the regular hexagon, and the unidirectional prepreg is folded to the bottom. The prepreg is uninterrupted; starting from the third edge, the unidirectional prepreg N° layup is folded to the bottom along the side of the regular hexagon and the ninth edge, and the unidirectional prepreg is uninterrupted; The layering starts at the fourth edge, and the unidirectional prepreg N° layer is folded to the bottom along the side of the regular hexagon and the tenth edge, and the unidirectional prepreg is uninterrupted; it starts from the fifth edge. Layer, the unidirectional prepreg N° layup is folded along the side of the regular hexagon and the eleventh edge to the bottom, the unidirectional prepreg is uninterrupted; the layup starts from the sixth edge, and the unidirectional prepreg is The N° layer is folded to the bottom along the side and twelfth edge of the regular hexagon, and the unidirectional prepreg is uninterrupted; from the first edge, the second edge, the third edge, and the fourth edge , N° layers of unidirectional prepreg laid at the beginning of the fifth edge and the sixth edge, all folded and laid to the bottom, and the N° layers of unidirectional prepregs in different directions have excess length after the bottom face is connected The bottom surface and six sides except the bottom surface fracture are layered; among them, the bottom surface fracture is a regular hexagon with the same shape as the bottom surface; the fiber woven cloth is covered with the bottom surface fracture.

In the above-mentioned lamination method of the regular hexagonal composite open shell, in step 6, the lamination starts from the first edge, and the 90° lamination of the unidirectional prepreg is along the side and the seventh edge of the regular hexagon. Fold over and stop at the center of the bottom surface, and cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the two endpoints of the seventh edge; start from the second edge to lay up the unidirectional prepreg at 90° After the layup is folded along the eighth edge, it is laid at the center of the bottom surface, and the unidirectional prepreg outside the triangle area formed by the center of the bottom surface and the two end points of the eighth edge is cut off; the laying starts from the third edge. layer, the unidirectional prepreg 90° layup is folded along the ninth edge and then spreads to stop at the center of the bottom surface, and the unidirectional prepreg outside the triangle area formed by the center of the bottom surface and the two endpoints of the ninth edge is cut off ; Start laying up from the fourth edge, the unidirectional prepreg 90° layup is folded along the tenth edge and then lays down at the center of the bottom surface, and the center of the bottom surface and the two endpoints of the tenth edge form a triangular area The outer unidirectional prepreg is cut off; the layering starts from the fifth edge, and the 90° layering of the unidirectional prepreg is folded along the eleventh edge and then spreads at the center of the bottom surface, and the center of the bottom surface is the same as the tenth edge. The unidirectional prepreg outside the triangular area formed by the two end points of one edge is cut off; the layers are laid from the sixth edge, and the 90° unidirectional prepreg is folded along the twelfth edge and then laid on the bottom surface Stop at the center, and cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the two endpoints of the twelfth edge.

Compared with the prior art, the present invention has the following beneficial effects:

The layering method of the invention ensures that the main bearing surfaces and edges of the open shell of the regular polygon composite material are continuous, and the fracture surface is the bottom surface of the regular polygon with low mechanical requirements, thereby effectively ensuring the opening of the regular polygon composite material. Mechanical properties of the shell after curing. This layering method also ensures the symmetry of each layer of the regular polygon composite open shell, thereby effectively ensuring the dimensional stability of the regular polygon composite open shell after curing.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

1 is a schematic structural diagram of a regular hexagonal composite open shell provided by an embodiment of the present invention;

2 is a schematic diagram of a 0° layup provided by an embodiment of the present invention;

3 is a schematic diagram of an M° (angle between 0° and 60°) layup provided by an embodiment of the present invention;

4 is a schematic diagram of a 60° layup provided by an embodiment of the present invention;

5 is a schematic diagram of N° (angle between 60° and 90°) layup provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a 90° layup provided by an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

This embodiment provides a method for laying up a regular hexagonal composite open shell, the method comprising the following steps: Step 1: Presetting a regular hexagonal composite open shell; wherein, the regular hexagonal composite open shell Including six sides and a bottom; all six sides are connected with the bottom; as shown in Figure 1.

Step 2: The unidirectional prepreg is layered at 0° on six sides and one bottom surface;

Step 3: On the basis of Step 2, the unidirectional prepreg is layered with M° on six sides and one bottom surface; wherein, M° is an angle between 0° and 60°;

Step 4: On the basis of Step 3, the unidirectional prepreg is layered at 60° on six sides and one bottom surface;

Step 5: On the basis of Step 4, the unidirectional prepreg is layered with N° on six sides and one bottom surface; wherein, N° is an angle between 60° and 90°;

Step 6: On the basis of Step 5, the unidirectional prepreg is layered at 90° on six sides and one bottom surface.

In step 2, as shown in Figure 2, the height direction along the regular hexagon on the side is defined as the 0° direction of the fiber, and the direction naturally formed after the side fiber is folded along the edge of the regular hexagon is defined as the 0° direction of the fiber on the bottom surface ° direction; the edges at the opening of the regular hexagon are respectively defined as the first edge 1, the second edge 2, the third edge 3, the fourth edge 4, the fifth edge 5, the sixth edge 6, The seventh edge 7, the eighth edge 8, the ninth edge 9, the tenth edge 10, the eleventh edge 11 and the twelfth edge 12, starting from the first edge 1, the single The 0° lay-up of the prepreg is folded along the seventh edge 7 and then laid at the center 20 of the bottom surface, and the unidirectional prepreg is cut outside the triangular area formed by the center 20 of the bottom surface and the two end points of the seventh edge 7. The layering starts from the second edge 2, and the unidirectional prepreg 0° layer is folded along the eighth edge 8 and then spreads at the bottom center 20 and stops at the bottom center 20 and the eighth edge 8. The unidirectional prepreg outside the triangular area formed by the endpoints is cut off; the layering starts from the third edge 3, and the unidirectional prepreg 0° layer is folded along the ninth edge 9 and then laid on the bottom center 20 The unidirectional prepreg outside the triangular area formed by the center 20 of the bottom surface and the two end points of the ninth edge 9 is cut off; starting from the fourth edge 4, the unidirectional prepreg is laminated at 0° After being folded along the tenth edge 10, the unidirectional prepreg outside the triangle area formed by the bottom center 20 and the two end points of the tenth edge 10 is cut off; from the fifth edge 5 Start laying up, the unidirectional prepreg 0° layup is turned along the eleventh edge 11 and then spreads to the bottom center 20 and stops, the bottom center 20 and the two endpoints of the eleventh edge 11 form a triangular area The outer unidirectional prepreg is cut off; the layering starts from the sixth edge 6, and the 0° layering of the unidirectional prepreg is folded along the twelfth edge 12 and then spreads at the bottom center 20 and stops at the bottom center. The unidirectional prepreg outside the triangular area formed by 20 and the two end points of the twelfth edge 12 is cut off.

In step 3, as shown in Figure 3, the layering starts from the first edge 1, and the unidirectional prepreg M° layering is folded to the bottom along the side of the regular hexagon and the seventh edge 7. The prepreg is uninterrupted; the layering starts from the second edge 2, the unidirectional prepreg M° layer is turned to the bottom along the side of the regular hexagon and the eighth edge 8, and the unidirectional prepreg is uninterrupted ; Starting from the third edge 3, the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the ninth edge 9, and the unidirectional prepreg is uninterrupted; from the fourth edge Start laying at edge 4, and the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the tenth edge 10, and the unidirectional prepreg is uninterrupted; starting from the fifth edge 5 Layer, the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the eleventh edge 11, and the unidirectional prepreg is uninterrupted; starting from the sixth edge 6, the unidirectional The prepreg M° layup is turned to the bottom along the side of the regular hexagon and the twelfth edge 12, and the unidirectional prepreg is uninterrupted; from the first edge 1, the second edge 2, the third edge 3. The unidirectional prepreg M° layered at the beginning of the fourth edge 4, the fifth edge 5 and the sixth edge 6, and the layers are all folded to the bottom, and the unidirectional prepreg M in different directions °The excess length of the layup layer is cut off after the bottom face is connected to form a layup on the bottom face and six sides except the bottom face fracture; the bottom face fracture is a regular hexagon with the same shape as the bottom face; the fiber woven fabric is covered with the bottom face fracture.

In step 4, as shown in FIG. 4, the layering starts from the first edge 1, and the 60° layering of the unidirectional prepreg is folded along the side of the regular hexagon and the seventh edge 7 and folded to the center of the bottom surface 20 Stop, cut off the unidirectional prepreg outside the triangular area formed by the center 20 of the bottom surface and the two endpoints of the seventh edge 7; start laying up from the second edge 2, and lay the unidirectional prepreg at 60° along the After the eighth edge 8 is folded, the unidirectional prepreg outside the triangular area formed by the bottom center 20 and the two end points of the eighth edge 8 is cut off; from the third edge 3 Start laying, the unidirectional prepreg 60° lay-up is folded along the ninth edge 9 and then spreads at the bottom center 20 and stops, and the single point outside the triangular area formed by the bottom center 20 and the two end points of the ninth edge 9. Cut off to the prepreg; start from the fourth edge 4, lay the unidirectional prepreg 60° layer along the tenth edge 10, and then lay it at the bottom center 20, and the bottom center 20 is the same as the tenth edge. The unidirectional prepreg outside the triangular area formed by the two end points of the edge 10 is cut off; the layering starts from the fifth edge 5, and the 60° layering of the unidirectional prepreg is turned along the eleventh edge 11 After the laying stops at the bottom center 20, the unidirectional prepreg outside the triangular area formed by the bottom center 20 and the two end points of the eleventh edge 11 is cut off; starting from the sixth edge 6, the unidirectional prepreg is The 60° layup of the prepreg is folded along the twelfth edge 12 and then laid at the center 20 of the bottom surface, and the unidirectional prepreg outside the triangular area formed by the center 20 of the bottom surface and the two end points of the twelfth edge 12 cut off.

In step 5, as shown in Figure 5, the layering starts from the first edge 1, and the unidirectional prepreg N° layering is folded to the bottom along the side of the regular hexagon and the seventh edge 7, and the unidirectional prepreg is folded to the bottom. The prepreg is uninterrupted; the layering starts from the second edge 2, and the unidirectional prepreg N° layer is turned to the bottom along the side of the regular hexagon and the eighth edge 8, and the unidirectional prepreg is uninterrupted ; Starting from the third edge 3, the unidirectional prepreg N° layup is turned to the bottom along the side of the regular hexagon and the ninth edge 9, and the unidirectional prepreg is uninterrupted; from the fourth edge Start laying at edge 4, and the unidirectional prepreg N° layup is turned to the bottom along the side of the regular hexagon and the tenth edge 10, and the unidirectional prepreg is uninterrupted; starting from the fifth edge 5 Layer, the unidirectional prepreg N° layup is folded to the bottom along the side of the regular hexagon and the eleventh edge 11, and the unidirectional prepreg is uninterrupted; starting from the sixth edge 6, the unidirectional The prepreg N° layup is folded to the bottom along the side of the regular hexagon and the twelfth edge 12, and the unidirectional prepreg is uninterrupted; from the first edge 1, the second edge 2, and the third edge 3. The N° unidirectional prepregs laid at the beginning of the fourth edge 4, the fifth edge 5 and the sixth edge 6 are all folded and laid on the bottom, and the unidirectional prepregs in different directions are laid at N° After the bottom surface is connected, the excess length is cut off to form the bottom surface and the six sides except the bottom surface fracture; among them, the bottom surface fracture is a regular hexagon with the same shape as the bottom surface; the fiber woven cloth is covered with the bottom surface fracture.

In step 6, as shown in Figure 6, the layering starts from the first edge 1, and the 90° layering of the unidirectional prepreg is folded along the side of the regular hexagon and the seventh edge 7 to the center of the bottom surface 20 Stop, cut off the unidirectional prepreg outside the triangular area formed by the center 20 of the bottom surface and the two endpoints of the seventh edge 7; start laying up from the second edge 2, and lay the unidirectional prepreg at 90° along the After the eighth edge 8 is folded, the unidirectional prepreg outside the triangular area formed by the bottom center 20 and the two end points of the eighth edge 8 is cut off; from the third edge 3 Start laying up, the unidirectional prepreg 90° layup is folded along the ninth edge 9 and then spreads at the bottom center 20 and stops, and the single point outside the triangular area formed by the bottom center 20 and the two end points of the ninth edge 9. Cut off to the prepreg; start from the fourth edge 4, lay the unidirectional prepreg at 90° along the tenth edge 10 and then lay it at the bottom center 20 and stop at the bottom center 20 and the tenth edge. The unidirectional prepreg outside the triangular area formed by the two end points of the edge 10 is cut off; starting from the fifth edge 5, the unidirectional prepreg 90° layup is turned along the eleventh edge 11 After the laying stops at the bottom center 20, the unidirectional prepreg outside the triangular area formed by the bottom center 20 and the two end points of the eleventh edge 11 is cut off; starting from the sixth edge 6, the unidirectional prepreg is The 90° layup of the prepreg is folded along the twelfth edge 12 and then laid at the center 20 of the bottom surface, and the unidirectional prepreg outside the triangular area formed by the center 20 of the bottom surface and the two end points of the twelfth edge 12 cut off.

The regular polygon composite open shell layup includes multiple layers, each layer is a unidirectional prepreg layup, and the layup adopts a male mold tooling.

When laying up, the height direction of the regular polygon on the side is defined as the 0° direction of the fiber, and the direction that the side fiber naturally forms after being folded along the polygon edge is defined as the 0° direction of the fiber on the bottom surface. The edges at the opening of the regular polygon are respectively defined as the first edge 1, the second edge 2, the third edge 3, the fourth edge 4, the fifth edge 5, the sixth edge 6, and the seventh edge 7. The eighth edge 8, the ninth edge 9, the tenth edge 10, the eleventh edge 11 and the twelfth edge 12, 0° layering select any side of the regular polygon to start, first from the regular polygon The layering starts at the first edge 1 of the opening of the polygonal shell, and the 0° layering of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and stops at the center 20 of the regular polygon on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. Then start the layup from the second edge 2 of the regular polygon shell, and the 0° layup of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and stops at the center of the regular polygon 20 on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The third step starts from the third edge 3 of the regular polygon shell, and the 0° layer of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and stops at the center of the regular polygon 20 on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The fourth step is to start laying up at the fourth edge 4 of the regular polygon shell. The 0° lay-up of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and then stops at the center of the regular polygon 20 on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The fifth step is to start the layup at the fifth edge 5 of the regular polygon shell. The 0° layup of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and then stops at the center of the regular polygon 20 on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The sixth step is to start the layup at the sixth edge 6 of the regular polygon shell. The 0° layup of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and then stops at the center of the regular polygon 20 on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. All surfaces of the polygonal shell tooling are covered, the fibers are butted without overlapping, and finally a regular polygonal composite open shell 0° layup is formed.

Step 3: Continue to lay N° ply on the 0° ply. N° ply is defined as an angle between 0° and 90°. N° is based on the 0° direction. N° layering starts from the edge of any opening of the regular polygon, starts from the first edge 1 of the regular polygon shell, and then folds along the edges of the side and bottom surface of the regular polygon, the fibers are uninterrupted, and then Start from the second edge 2 of the regular polygon shell with unidirectional prepreg N° layup, and fold along the edges of the regular polygon side and bottom surface, the fibers are uninterrupted, and the prepregs are connected by butt joints. Do not overlap, continue to use unidirectional prepreg N° layup from the third edge 3 of the regular polygon shell, fold along the edges of the regular polygon side and bottom surface, the fibers are uninterrupted, and the prepreg Butt joints are used between the materials without overlapping. Continue, use the unidirectional prepreg N° layer to start the layer from the fourth edge 4 of the regular polygon shell, and turn it along the edges of the regular polygon side and bottom surface. The fibers are uninterrupted, and the prepregs are butted without overlapping. Continue, the unidirectional prepreg N° layup starts from the fifth edge 5 of the regular polygon shell, along the sides and bottom of the regular polygon. The edges are folded, the fibers are uninterrupted, and the prepregs are butted without overlapping. Continue, the unidirectional prepreg N° layup starts from the sixth edge 6 of the regular polygon shell, It is folded along the edges of the sides and bottom of the regular polygon, the fibers are uninterrupted, and the prepregs are butted without overlapping. N° layup of unidirectional prepregs starting from the first edge 1, the second edge 2, the third edge 3, the fourth edge 4, the fifth edge 5, and the sixth edge 6, all After folding along the edges of the polygonal bottom surface, the layers are laid to the bottom surface, and the excess length of the prepregs in different directions is cut off after the bottom surface is connected. The bottom surface fracture will form a polygon (Q) with the same shape as the bottom surface. This area is covered with (0/90) fiber woven cloth. 0° is along the edge direction of the fracture polygon. All the fibers at the splices are butted without overlapping. Form a regular polygonal composite open shell N° layup. In particular, when N is ±{1/2[(n-2)×(180/n)]}, the bottom surface fracture is just butted completely, and a polygonal fracture with the same shape as the bottom surface will not be formed (Fig. 3-2).

Step 4: 90° is based on the 0° direction. Start from any side of the regular polygon for 90° layup, start from any side of the regular polygon for 90° layup, start from the first edge 1 of the regular polygon shell, and lay the unidirectional prepreg at 90° After the layer is folded along the edge of the bottom surface of the polygon, it stops at the center of the regular polygon on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. Then start laying up from the second edge 2 of the regular polygon shell, and the unidirectional prepreg 90° layup is folded along the edge of the bottom surface of the polygon and then stops at the center of the regular polygon on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The third step starts from the third edge 3 of the regular polygon shell, and the unidirectional prepreg 90° layup is folded along the edge of the bottom surface of the polygon and stops at the center of the regular polygon on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The fourth step starts laying at the fourth edge 4 of the regular polygon shell. The 90° lay-up of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and stops at the center of the regular polygon on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The fifth step is to start the layup at the fifth edge 5 of the regular polygon shell. The 90° layup of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and then stops at the center of the regular polygon on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. The sixth step is to start the layup at the sixth edge 6 of the regular polygon shell. The 90° layup of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and then stops at the center of the regular polygon on the bottom surface. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. All surfaces of the polygonal shell tooling are covered, the fibers are butted without overlapping, and finally a 90° layup of a regular polygonal composite open shell is formed.

Step 5: According to the thickness of the product, perform (0/±N/90)ns layering in sequence until the desired thickness is reached.

Step 6: According to the curing system of the product, normal temperature rise, pressure curing, and demoulding.

According to the (0°/±45°/±60°/90) S-angle layup sequence, the unidirectional prepreg was used for layup on the regular hexagon mold. The 0° direction of the side surface is along the height direction, and the 0° direction of the fibers on the bottom surface is the direction naturally formed after the side fibers are folded along the polygonal edge.

The 0° layering starts from any side of the regular hexagon, and starts from the opening edge of the regular hexagon shell. The 0° layering of the unidirectional prepreg is folded along the edge of the bottom surface of the polygon and then laid on the bottom surface. Stop at the center of the regular polygon. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. Cover all sides of the hexagonal shell tool in this manner, with the fibers butted but not lapped.

±45° is based on the 0° direction, select the edge of any opening of the regular hexagon, start from the edge of the opening of the regular hexagon shell, and the ±45° unidirectional prepreg is along the edge of the polygon bottom surface. After the edges are folded, the layers are layered to the bottom, and the layers are folded along the side edges to the next side, and the fibers on the next side are folded along the corresponding bottom edges to be laid on the bottom. The bottom fracture will form a regular hexagon, and this area is covered with (0/90) woven fabric. ﹢The regular hexagonal fracture on the bottom surface between the 45° ply and the -45° ply shall be staggered by at least 10mm or more.

±60° is based on the 0° direction, select the edge of any opening of the regular hexagon, start from the edge of the opening of the regular hexagon shell, and the ±60° unidirectional prepreg is along the edge of the polygon bottom surface. After the edge is folded, the layers are laid to the bottom, and the layers are folded along the side edges to the next side. The fibers on the next side are then folded along the corresponding bottom edge and laid on the bottom, and the bottom is completely butted after laying. , does not form a regular hexagonal fracture. ﹢The regular hexagonal fracture on the bottom surface between the 60° ply and the -60° ply should be staggered by at least 10mm or more.

90° is based on the 0° direction, select any side of the regular polygon, start from the opening edge of the regular polygon shell, and lay the 90° unidirectional prepreg along the edge of the bottom surface of the polygon and then lay it on the bottom surface. Stop at the center of the face regular polygon. Cut off the unidirectional prepreg outside the triangular area formed by the center of the bottom surface and the end points of the side edges. Then lay the layers in the order of 90/-60/﹢60/-45/﹢45/0.

During the whole layup process, the operator can pre-cut the material first, and then lay it on the male mold tool according to the layup angle order. , demoulding.

The layup method of this embodiment ensures that the fibers at the main bearing surfaces and edges of the open shell of the regular polygonal composite material are continuous, and the fracture surface is the bottom surface of the regular polygonal polygon with low mechanical requirements, thereby effectively ensuring the regular polygonal composite material. Mechanical properties of open shells after curing. This layering method also ensures the symmetry of each layer of the regular polygon composite open shell, thereby effectively ensuring the dimensional stability of the regular polygon composite open shell after curing.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can use the methods and technical contents disclosed above to improve the present invention without departing from the spirit and scope of the present invention. The technical solutions are subject to possible changes and modifications. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention belong to the technical solutions of the present invention. protected range.

Claims

A method for laying up a regular hexagonal composite open shell, characterized in that the method comprises the following steps:

Step 1: Presetting a regular hexagonal composite open shell; wherein, the regular hexagonal composite open shell includes six sides and a bottom; all six sides are connected to the bottom;

Step 2: Use unidirectional prepreg to lay 0° on six sides and one bottom surface;

Step 3: On the basis of Step 2, use unidirectional prepreg to lay M° on six sides and one bottom surface; wherein, M° is an angle between 0° and 60°;

Step 4: On the basis of Step 3, use unidirectional prepreg to lay 60° layers on six sides and one bottom surface;

Step 5: On the basis of Step 4, use unidirectional prepreg to use N° layup on six sides and one bottom surface; wherein, N° is an angle between 60° and 90°;

Step 6: On the basis of Step 5, use unidirectional prepreg to lay up 90° layers on six sides and one bottom surface.
The method for laying up regular hexagonal composite open shells according to claim 1, wherein in step 2, the height direction along the regular hexagon on the side is defined as the 0° direction of the fibers, and the lateral fibers are along the regular hexagon. The direction naturally formed after the edge of the polygon is folded is defined as the 0° direction of the fiber on the bottom surface; the edges at the opening of the regular hexagon are respectively defined as the first edge (1), the second edge (2), the third edge Edge (3), fourth edge (4), fifth edge (5), sixth edge (6); the edges of the bottom surface are defined as the seventh edge (7), the eighth edge ( 8), the ninth edge (9), the tenth edge (10), the eleventh edge (11) and the twelfth edge (12).

Lay-up starts from the first edge (1), the 0° layer of the unidirectional prepreg is folded along the seventh edge (7) and then stops at the bottom center (20), the bottom center (20) and the first Cut off the unidirectional prepreg outside the triangular area formed by the two endpoints of the seven-sided edge (7);

Lay-up starts from the second edge (2), the 0° layer of the unidirectional prepreg is folded along the eighth edge (8), and then is laid down at the bottom center (20), and the bottom center (20) and the first Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the octagonal edge (8);

Lay-up starts from the third edge (3), and the 0° layer of the unidirectional prepreg is folded along the ninth edge (9) and then laid down at the bottom center (20), and the bottom center (20) and the first Cut off the unidirectional prepreg outside the triangular area formed by the two endpoints of the nine-edge (9);

Lay-up starts from the fourth edge (4), and the 0° layer of the unidirectional prepreg is folded along the tenth edge (10) and then laid down at the bottom center (20). Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the ten-edge (10);

Lay-up starts from the fifth edge (5), and the 0° lay-up of the unidirectional prepreg is folded along the eleventh edge (11) and then laid down at the bottom center (20), and the bottom center (20) and Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the eleventh edge (11);

Lay-up starts from the sixth edge (6), the 0° layer of the unidirectional prepreg is folded along the twelfth edge (12), and then is laid at the bottom center (20), and the bottom center (20) is the same as the bottom center (20). The unidirectional prepreg outside the triangular area formed by the two end points of the twelfth edge (12) is cut off.
The method for laying up regular hexagonal composite open shells according to claim 2, characterized in that: in step 3, starting from the first edge (1) for laying, the unidirectional prepreg M° is laid The layer is folded to the bottom along the side of the regular hexagon and the seventh edge (7), and the unidirectional prepreg is uninterrupted;

Starting from the second edge (2), the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the eighth edge (8), and the unidirectional prepreg is uninterrupted;

Starting from the third edge (3), the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the ninth edge (9), and the unidirectional prepreg is uninterrupted;

Starting from the fourth edge (4), the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the tenth edge (10), and the unidirectional prepreg is uninterrupted;

Start laying up from the fifth edge (5), the unidirectional prepreg M° layup is turned to the bottom along the side surface of the regular hexagon and the eleventh edge (11), and the unidirectional prepreg is uninterrupted;

Starting from the sixth edge (6), the unidirectional prepreg M° layup is turned to the bottom along the side of the regular hexagon and the twelfth edge (12), and the unidirectional prepreg is uninterrupted;

The unidirectional prepreg M° layup is formed from the first edge (1), the second edge (2), the third edge (3), the fourth edge (4), the fifth edge (5) and the The M° layer of the unidirectional prepreg laid at the beginning of the sixth edge (6) is all folded and then layered to the bottom, and the M° unidirectional prepreg in different directions is cut off after the bottom surface is connected with the excess length. The bottom surface and the six side surfaces forming the fracture except the bottom surface are layered; wherein, the bottom surface fracture is a regular hexagon with the same shape as the bottom surface;

The fiber woven cloth is covered with the bottom fracture.
The method for laying up regular hexagonal composite open shells according to claim 3, characterized in that: in step 4, starting from the first edge (1), laying the unidirectional prepreg at 60° The layer is folded along the side of the regular hexagon and the seventh edge (7) to stop at the bottom center (20), and the single layer outside the triangular area formed by the bottom center (20) and the two endpoints of the seventh edge (7) cut to the prepreg;

Laying starts from the second edge (2), the 60° unidirectional prepreg layer is folded along the eighth edge (8) and then stops at the bottom center (20), the bottom center (20) and the first Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the octagonal edge (8);

Laying starts from the third edge (3), the 60° unidirectional prepreg layer is turned along the ninth edge (9), and then is laid down at the bottom center (20), and the bottom center (20) and the first Cut off the unidirectional prepreg outside the triangular area formed by the two endpoints of the nine-edge (9);

Lay-up starts from the fourth edge (4), the 60° unidirectional prepreg layer is turned along the tenth edge (10), and then is laid down at the center (20) of the bottom surface, and the center of the bottom surface (20) is the same as the center of the bottom surface (20). Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the ten-edge (10);

Laying starts from the fifth edge (5), the 60° unidirectional prepreg layer is turned along the eleventh edge (11), and then is laid down at the bottom center (20), and the bottom center (20) is the same as the bottom center (20). Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the eleventh edge (11);

Lay-up starts from the sixth edge (6), the 60° unidirectional prepreg layer is turned along the twelfth edge (12), and then is laid at the bottom center (20), and the bottom center (20) is the same as the bottom center (20). The unidirectional prepreg outside the triangular area formed by the two end points of the twelfth edge (12) is cut off.
The method for laying up regular hexagonal composite open shells according to claim 4, characterized in that: in step 5, laying up starts from the first edge (1), and the unidirectional prepreg is laid at N° The layer is folded to the bottom along the side of the regular hexagon and the seventh edge (7), and the unidirectional prepreg is uninterrupted;

Starting from the second edge (2), the unidirectional prepreg N° layup is turned to the bottom along the side of the regular hexagon and the eighth edge (8), and the unidirectional prepreg is uninterrupted;

Starting from the third edge (3), the unidirectional prepreg N° layup is turned to the bottom along the side of the regular hexagon and the ninth edge (9), and the unidirectional prepreg is uninterrupted;

Starting from the fourth edge (4), the unidirectional prepreg N° layup is turned to the bottom along the side of the regular hexagon and the tenth edge (10), and the unidirectional prepreg is uninterrupted;

Starting from the fifth edge (5), the unidirectional prepreg N° layup is turned to the bottom along the side of the regular hexagon and the eleventh edge (11), and the unidirectional prepreg is uninterrupted;

Starting from the sixth edge (6), the unidirectional prepreg N° layup is turned to the bottom along the side of the regular hexagon and the twelfth edge (12), and the unidirectional prepreg is uninterrupted;

Start from the first edge (1), the second edge (2), the third edge (3), the fourth edge (4), the fifth edge (5) and the sixth edge (6) N° of the unidirectional prepreg, which is all folded and layered to the bottom, and the N° unidirectional prepreg in different directions is cut off after the bottom face is connected to form the bottom and six sides of the bottom fracture. Laminate; wherein, the bottom fracture is a regular hexagon with the same shape as the bottom;

The fiber woven cloth is covered with the bottom fracture.
The method for laying up regular hexagonal composite open shells according to claim 5, characterized in that: in step 6, starting from the first edge (1) for laying up, the unidirectional prepreg is laid at 90° The layer is folded along the side of the regular hexagon and the seventh edge (7) to stop at the bottom center (20), and the single layer outside the triangular area formed by the bottom center (20) and the two endpoints of the seventh edge (7) cut to the prepreg;

Laying starts from the second edge (2), and the unidirectional prepreg 90° layup is folded along the eighth edge (8) and then is laid down at the bottom center (20), and the bottom center (20) is connected to the first edge (20). Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the octagonal edge (8);

Laying starts from the third edge (3), the unidirectional prepreg 90° layup is folded along the ninth edge (9), and then is laid down at the bottom center (20), and the bottom center (20) is the same as the third edge (20). Cut off the unidirectional prepreg outside the triangular area formed by the two endpoints of the nine-edge (9);

Lay-up starts from the fourth edge (4), the unidirectional prepreg 90° layup is turned along the tenth edge (10), and then is laid down at the bottom center (20), and the bottom center (20) is connected to the first edge (20). Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the ten-edge (10);

Lay-up starts from the fifth edge (5), the unidirectional prepreg 90° layup is turned along the eleventh edge (11) and then is laid down at the bottom center (20), and the bottom center (20) is the same as the bottom center (20). Cut off the unidirectional prepreg outside the triangular area formed by the two end points of the eleventh edge (11);

Lay-up starts from the sixth edge (6), the unidirectional prepreg 90° layup is turned along the twelfth edge (12), and then is laid at the bottom center (20), and the bottom center (20) is the same as the bottom center (20). The unidirectional prepreg outside the triangular area formed by the two end points of the twelfth edge (12) is cut off.